410 ILCS 605/2.1
When in the interest of the general public and in the opinion of the Department of Agriculture it is deemed advisable, the Department has authority to quarantine or restrict any and all animals intended for human consumption that contain poisonous or deleterious substances which may render meat or meat products or poultry or poultry products from such animals or poultry injurious to health; except in case the quantity of such substances in such animals does not ordinarily render meat or meat products or poultry or poultry products from such animals injurious to health.
The Department or its duly authorized agent shall investigate or cause to be investigated all cases where it has reason to believe that animals intended for human consumption are contaminated with any poisonous or deleterious substance which may render them unfit for human consumption.
The Department or its duly designated agent in performing the duties vested in it under this Act is empowered to enter any premises, barns, stables, sheds, or other places for the purposes of administering this Act.
The Department may allow the sale or transfer of animals under quarantine or restriction subject to reasonable rules and regulations as may be prescribed.
For the purposes of this Act, the term "Animal" means cattle, calves, sheep, swine, goats, poultry and any other animal which can be or may be used in and for meat or poultry or their products for human consumption.
410 ILCS 605/2.1